Alkene Reactions Overview Cheat Sheet – Organic Chemistry

The true key to successful mastery of alkene reactions lies in practice practice practice. However, when you have a homework assignment, quiz,exam around the corner, it helps to have a reaction summary guide for quick reference. That’s why I created this alkene reaction overview. This guide is designed to help you recognize alkene reaction products at a quick glance including key components such as syn/anti addition or Markovnikov/anit-Markovnikov products.

If you find this cheat sheet useful please click the share buttons above

For in-depth learning of alkene reactions watch my Tutorial Videos or visit my Reaction Library. Mastered the basics?  Click HERE for my FREE Alkene Reactions Practice Quiz

right-click the image below then select ‘save as’ or print for the full version

See the detailed video explaining this cheat sheet linked on the bottom of this page. Alkene Reactions Cheat Sheet Leah4sci Organic Chemistry

18 Alkene Reaction Shortcuts in 15 Minutes

The video below is a walk-through of the above cheat sheet explaining the reaction tricks and shortcuts.


  1. Tomorrow is my hydrocarbon test and I wonder 2 complete my whole revision within just 15-20 mins by using ur orgo cheat sheets and shortcut videos.I ‘ve been seeing & enjoying mechanisms of reactions, which would be otherwise so boring ,from a long time from ur orgo videos. Thankful to u always and forever ,for changing my perceptions & learning how to grasp organic chemistry. Anshul

  2. great job i love it..


  4. Quite extraordinary work
    Just perfect for Late Revision notes!!!

    Send link to Alkane, Alkyne, Aromatic notes pls

  5. Is the oxidative cleavage on your cheat sheet correct?

  6. Your channel is great….i really understood a lot better….but i saw there are very few videos…like few named reactions(hundsdiecker, diazotization, sandmaeyer, frinkelstein, NBS..etc). It would be great if u could get these added(forgive me if the reactions were embedded in some other video i didn’t check out)

  7. I am struggling so bad in ochem, is there any way you can help me or give me tips??

  8. Thank you soo much. Exam was Monday but rained out in Houston. Surfing web came across your tutorials. So very much helpful.

  9. I am a bit confused with the oxidative cleavage. In the video you got CO2 but that is not what you have on the “cheat sheet.” Can you please explain the oxidative cleavage a little bit more? Thank you!

  10. Thank you so much Leah for your time, this is very helpful.

  11. good work,,,

  12. very good work… can you help me about benzene reactions… 🙂

  13. I’m doing a practice exam and your cheat sheet is awesome but what would I write to “specify the expected major organic product” when I solve the reactions. For a hydrogenation reaction I don’t see how there could be a minor(or if there is a minor)

    • Leah4sci says

      Not every reaction will have a major/minor. Keep in mind that when you have a carbocation the Markovnikov product is considered the major. Not every professor will ask for the Anti-Markovnikov as the minor

  14. It was very useful for me. Thanks

  15. Hi Leah- you have been so helpful with getting started with organic chem. I still hate it but at least I’m starting to grasp it. Do you have any information on writing condensed formulas for aromatics (benzene, toluene, phenol, aniline)? Thank you!


  17. gloria kalenga says

    wow am loving your video and where are you located I need to join the organic chemistry hall for help because I’ miss sometimes what the professor says sometimes

    • Thank you Gloria. I live in NY but the study hall is an online program which you can access from anywhere. Details:

  18. Thank you so much Leah maam that you have
    guided me in organic chemistry in lack of my course

  19. So we only use hydride and methyl shift mechanism in hydrohalogenation and acid catalyzed hydration ?

  20. Thanks a lot for helping us in organic chemistry….I adore organic….I have a problem about anti…our instructors didn’t mention it as well what about 1,2-diols using HIO4 as reagent thanks a lot I appreciate that

  21. Prakhar Yadav says

    Thank you so much for making this organic chemistry so simple n easy to learn Leah ma’am, it was a bit too complicated before. 🙂

  22. I failed my class, and technically need to take one last exam first thing next year to see if I’d get a second chance and pass, but I love your website because it’s so helpful. I’ve used it all semester. Thank you for this! <3

    • I’m sorry to hear that you failed your exam. Passively watching videos is NOT enough. You must learn, practice, take notes… and follow the advice in my 10-secrets guide to do well

  23. Mohit Budhwani says

    Thankyou so much for making organic chemistry intresting……loved your videos….as well as ur voice…..

  24. I was looking for mechanisms when I found your website. I really whish I had found it when I began O Chem. it would had made a difference on my grade. Unfortunately, my final is in two days. your site is great though. You explain thing very 🙂 well thanks! I will let my classmates know about it

  25. wish i knew abt this site when i started my organic course

  26. I just want you to know that I’ve stopped watching other orgo videos because you explain everything so well! No more “gotta watch 5 different videos just to understand 1 topic.” Thanks so much!

  27. I’m a student all the way in South Africa and I love you so much…. I have a Chemistry exam tomorrow and you have saved my life

  28. Love you Lea

  29. Thanks Leah. I really appreciate this.

  30. Hey Leah! Do you have any videos about statistical analysis and experimental design? =)

  31. abhinav vij says

    thank you so much for your videos n for sharing your knowledge and experience with us. Your videos are to the point,apt n short as well. I have seen both orgo 1 n 2 videos and your teaching style is really good,acknowledgeable n helpful.
    Thank you 🙂

  32. Koruu Mauri says

    Wow I just found your site by watching your tutorial on YouTube and it was helpful in my study

    Thank U

  33. shakir hussain says

    can u send me Your skype i.d . i realy need ,, i need help

  34. Hi Leah,
    You are so helpful, thanks for having a lot of free resources!

  35. thank you so much !!! quick videos before my final!

  36. Hello,
    Thank you for all your hard work. Your videos have helped me a lot 🙂
    Cheers from UK!

  37. Hey there,

    Why is it that on this sheet, the Hydrogenation (H2/Pt) of an alkene is syn-addition where as on you sheet for Oxidation + Reduction, the alkene reduction with (H2/Pt) is anti-addition?

    • Leah4sci says

      Anne, it’s a syn addition, always. I double checked the sheet and don’t see the anti addition you refer to

  38. Seriously you are incredible, Leah! Your videos explain every concept so much more clearly and concisely than any professor I’ve ever had. And these cheat sheets are lifesavers.

  39. Waw you are amazing. You are of a great help for me GBU. I will keep following the link for more information on rearrangement reactions. Thank you.

  40. surbhi patel says

    You’re an angel. Thank you 🙂

  41. Hi, leah thankyou soo much …ur amazing at this stuff. ..ur videos have helped me out a lot, im about to have an exam and there’s no gap in the orgo paper , I would only have time to go through everything, could u pls guide me a bit ,I am downloding ur cheat sheets for quick revision.:-)

  42. divyanesha ramkhalawon says

    i never found organic as such after my A level, i had a great teacher at A level, u made me remember him, thank you so much.

  43. The videos are really awesome…but when can i expect the videos on rest of the topics like ozonolysis, polymerisation, ALKYNE REACTIONS, PREPARATION OF ALKENE, ALKYNE, ALKANE…..i find it difficult to understand from textbook..

  44. Thank you SOOO much, you are amazing!!!!!

  45. Masooma Zainab says

    Leah this really helps I was just trying to review all the reaction mechanism and this cheat sheet saved me from reading the whole book thanks.

  46. Thank you leah, even on this side of d world (World), d impact of ur contribution is still felt

  47. daria st-jean says

    Im in org 1 and woooo you just saved my semester! Thanks sooo much

  48. Thank so much! Definitely helped me on my test! You’re amazing!!!!!

  49. Thank you so much! You have a calm voice for teaching, it’s soothing. You explain everything better than any other professor.

  50. Thank you so much for posting this! 🙂

  51. You are AMAZING! I’m sure you’ve heard this before, but have you thought about becoming an orgo professor? Thank you so much for taking the time to create all of this! I have an exam this Friday that’s open notes and just printed some of yours to bring instead of mine because you broke the material down 100x better than what I attempted to do… At least it was good practice.

    • Thank you Samantha and good luck on your final exam. As for becoming a professor… nah I love so why would I do anything else?

  52. For Hydroboration-oxidation, shouldn’t the OH and the H be face the same direction. I’ve watched other videos and that’s what it seems to be but here you have them in opposite directions.

    • You’re correct Mike, the OH and H add via syn-addition. When shown in line structure there is no 3-D so it doesn’t matter. If you want to specify direction use dashes and wedges.

  53. says

    Leah, your simply AMAZING.. Keep doing what your doing. You explain 100 times better than any orgo professor…. You’ve helped a lot

  54. same here… my a levels is on monday im soo scared haha

  55. You are the greatest. Period. One hr remains till exam.

  56. Orgo 1- Looking forward to your next alkene reaction video! Many thanks again. The videos and this cheat sheet make it so much more clear

  57. Thank you so much for this cheat sheet and videos! They help me a whole lot!!

  58. very much helpful,neatly explained

  59. Wow I was feeling so hopeless, you’d be surprised by how difficult it is to find someone who can break down the concepts in such a detailed yet simplistic way that is easy to understand. Thank you so much for your help, and it is amazing of you to offer it for free 🙂

  60. You are very welcome

  61. Thank you for your kind words and wow, 5 weeks is rather intense for an organic chemistry course. How are you finding the material so far?

  62. thanks so much

    what about regarding alkyne

  63. marwa shyood says

    Thank you very much 🙂

  64. I really appreciate your you-tube videos that completely describe the reaction mechanisms for alkenes. I know it takes a lot of work and time, but I wanted to ask: When can we expect videos about the rest of the reactions? Especially the oxymercuration-demurcuration…

    • Thank you for the kind words about my videos. As for the remaining mechanisms I don’t know if/when I’ll post them. I focused on the main reactions that require simple mechanisms and then moved on to another series that students were asking for at the time

  65. Thanks!

  66. Wow you helping me MUCHO Thank You

  67. Barneel Phukan says

    This is really helpful…thanks..:-)

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